Answer:
spreadsheets
Explanation:
every company uses spreadsheets because they are used to list and organize data easily
Um maybe a glitch? Refresh your browser might help.
Operating System (OS) is the answer.
An application runs in/on an OS. It is not the OS itself. Like Word or Chrome are applications.
Systems is too generic and not specific enough to mean anything in this context. Throw away answer.
Network Operating System does not 'usually' run on a hard drive but on memory chips in things like routers, wireless access points and switches that move network traffic.
Three major functions of a game engine would be Physics, Programming, and an audio engine should be some major functions of a game engine.